
Delta Children Serta SleepTrue Mini
Score: 72/100
Sealy Baby Firm Rest
Score: 80/100Rankings

The Sealy EM438-PHN1 combines a hybrid coil-foam core with an antibacterial waterproof cover and 2-stage adjustability for versatile support. Its heavier weight and limited detailed information may be drawbacks for some buyers. Suited for parents prioritizing antibacterial protection and hybrid construction.

The Delta Children Serta SleepTrue Mini Crib Mattress delivers a firm, lightweight 4-inch profile with a waterproof vinyl cover and sustainable fiber core. Its thinness and absence of breathable cover may not satisfy parents wanting extra cushioning. Perfect for portable mini cribs where weight and exact fit are priorities.
| Attribute | ![]() | ![]() |
|---|---|---|
38 inches | 51.63 inchesbest | |
24 inches | 28 inchesbest | |
4 inches | 5.25 inchesbest | |
| ↓ lower better | 3.9 lbbest | 14.63 lb |
4best | 3 | |
1 yearsbest | — | |
— | 204best |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Dimensions(3) | ||
Length (inches) | 38 inches | 51.63 inches |
Width (inches) | 24 inches | 28.0 inches |
Height (Thickness) (inches) | 4 inches | 5.25 inches |
Safety & Certifications(2) | ||
Certifications | GREENGUARD Gold, JPMA, ASTM/CPSC, CPSIA | GREENGUARD GOLD, ASTM, CPSIA |
Number of Certifications | 4 | 3 |
Physical Specs(2) | ||
Weight (lb) | 3.9 lb | 14.63 lb |
Cover Material | waterproof vinyl | Antibacterial waterproof cover |

Products in the top-left offer the best value (high score, low price).

Professional editors highlight the mattress's compliance with GREENGUARD Gold, JPMA and ASTM/CPSC standards, emphasizing its low chemical emissions and safety for infant sleep, while noting its lightweight construction as a key advantage for portable setups.
Everyday users consistently praise the mattress's ultra-light weight, exact mini-crib fit, and firm support, but some express concerns about the thinness and occasional snug fit in cribs that are marginally shorter than the stated dimensions.
